While you are IN New Zealand, technically, the Residence visa will last for ever, giving you the right to live and work there. But once the two years' travel conditions that begin when you activate it run out, if you then leave the country without having made some other arrangement (PR, or variation of travel conditions if you qualify for them), you would have no right to re-enter, and your residence would lapse because you could not get back to resume living under it.
The travel conditions are not what you said. The travel conditions (which are a permission, rather than a condition) give you the right to enter NZ as many times as you want. Everyone gets this permission for two years, along with their residence visa, and PR holders also have this permission, for ever.
The 184 days out of each 12-month period are one way to qualify for PR - time spent in NZ as one way to have shown commitment to NZ.
https://www.immigration.govt.nz/new-...anent-resident
Although in theory a resident in NZ has the rights for life while s/he stays within the country, in practice, INZ firmly encourage people to get PR within five years.